Formula to convert 8.4 liters to gallons is to multiply 8.4 by 0.264172 (this is the value for 1 liter to gallon).
Convert 8.4 Liters to Gallons results
8.4 x 0.264172052 = 2.21904524016
8.4 l = 2.22 gal
To conclude the answer for 8.4 liters is two point twenty two gallons